standard ethernet -physical layer

2. CONTENTS
STANDARD ETHERNET
Physical layer
10Base5:Thick Ethernet
10Base2:Thin Ethernet
10Base-T:Twisted-Pair Ethernet
10Base-F:Fiber Ethernet

3. PHYSICAL LAYER
ENCODING AND DECODING
 At the sender, data are covered to a digital signal using the
Manchester scheme ,at the receiver, the received signal is
interpreted as Manchester and decode into data.
 All standard implementation use digital signaling at 10 Mbps.

4. CATEGORIES OF STANDARD
ETHERNET

5. ENCODING SE IMPLEMENTATION

6. 10BASE5:THICK ETHERNET
 The first implementation is called 10Base5, thick Ethernet, or
Thicknet.
 It was the first Ethernet specification to use bus topology with
an external transceiver connected via a tap to a thick coaxial
cable.
 The transceiver is responsible for transmitting , receiving ,and
detecting collision.

7. Cont….
 The transceiver is connected to the station via a transceiver
cable that provides separate paths for sending and receiving,
that collision only happen in coaxial cable.
 The maximum length of coaxial cable 500m,can be connected
using repeaters.

8. 10BASE5 IMPLEMENTATION

9. 10BASE2:THIN ETHERNET
 The second implementation is called 10Base2, or Cheapernet.
It also uses a bus topology, but the cable is much thinner and
more flexible.
 The cable can be bend to pass very close to the stations ,the
transceiver is normally part of the Network Interface
Card(NIC),which is installed inside the station.
 The length of each segment cannot exceed 185m and less
expensive.

10. 10BASE2 IMPLEMENTATION

11. 10BASE-T:TWISTED-PAIR ETHERNET
 The third implementation is called 10base-t or twisted-pair
ethernet.10base-T uses a physical star topology. The stations
are connected to a hub via 2 pairs of twisted cable.
 The two pairs of twisted cable create two paths between the
station and the hub. Any collision here happens in the hub.
 The maximum length of the twisted cable is as 100m, to
minimize the effect of attenuation in the twisted cable.

12. 10BASE-T IMPLEMENTATION

13. 10BASE-F:FIBER ETHERNET
 There are several types of optical fiber 12-Mbps Ethernet ,the
most common is called 10Base-F.
 It uses a star topology to connect stations to a hub , the
stations are connected to the hub using two fiber-optic cables.

14. 10BASE-F IMPLEMENTATION

15. QUESTIONS:
 Standard implementations use digital signaling at ----
 10Base5 was the first Ethernet specification to use a ---
 The second implementation is called-------
 10Base-T uses a ----------
 10Base-F uses a----------

16. THANK YOU